Events Calendar

Mobility Assisted Routing for Hybrid Ad Hoc Networks

Speaker: Dr. Xiaojun Wu, Associate Professor
School of Software Engineering & Department of Computer Science and Technology
Xi'an Jiaotong University (XJTU), Xi'an, ChinaHosted by Prof. Raghu RaghavendraAbstract:
Abstract: In hybrid ad hoc networks, most nodes are stationary, while only a few nodes move at a fast speed.
By exploiting the mobility assistance, the network performance, such as route quality and lifetime, can be
largely improved. Specially, a few fast moving nodes (FNs) collect last encounter information while they are
moving within the network. Whenever they encounter stationary nodes (SNs), they diffuse their last
encounter information to SNs. Based on the temporal-spatial correlation, both FNs and SNs can compute the
distance with other nodes, therefore the last encounter information can guide route search. Accordingly, we
develop one mobility assisted routing scheme for so-called hybrid ad hoc networks. The analytical model is
also addressed. Simulation results demonstrate that the route search cost is decreased significantly, and is
linear with the distance between source and destination nodes. Simulation results also illustrate the validation
of the analytical model. Moreover, our other related work will be briefly introduced, such as messenger
nodes based routing, mobility assisted clustering, mobility assisted service discovery, and mobility assisted
distributed certification.
Biography:
Dr. Xiaojun Wu is an associate professor in the School of Software Engineering at Xi'an Jiaotong University
(XJTU), Xi'an, China, where he is also an associate professor in the Department of Computer Science and
Technology. He received the B.S. degree in electrical engineering, the M.S. degree in computer science, and
the Ph.D. degree in electrical engineering from XJTU in 1990, 1999, and 2002, respectively. His research
interests include broadband mobile wireless Internet, next-generation wireless communication systems,
pervasive computing (or ubiquitous networking), web science and service science. He is author (or coauthor)
of more than 40 publications. He joined XJTU in July 2005 following a postdoctoral fellowship at Tsinghua
University (THU), Beijing, China from July 2003 through June 2005. From July 1990 through October 1995,
he was an engineer and programmer in the Tenth Research Institute of Ministry of Post and Telecom, Xi'an,
China. He received the Outstanding Ph.D. Grad Award of XJTU in 2002 and the Excellent Ph.D. Degree
Dissertation Award of XJTU in 2004.

Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248

Audiences: Everyone Is Invited

Contact: Annie Yu